Electric railway



(No'Model.)

J. HARTMAN, Jr.

ELECTRIC RAILWAY.

IINTTnn i @TATns FATnNT @Trina JOHN HARTMAN, Jia., on PHILADELPHIA,PENNSYLVANIA.

ELECTRIC RAI LWAY.

SPECIPCATIN forming part of Letters Patent No. 371,936, lated Octoberv25, 1887.

. Application filed Novomhcr12.l885. Serial No. 182,642. (Noniodcl.)

specification.

In the first place, the invention consists in connecting the axlestogether by means of an endless chain which passes around sprocketwheelsiixed upon the axles, by means of which connection greater traction isobtained for the wheels upon the rails, giving greater frictionalcontact on the rails, rotary motion being irnparted to the wheels bymeans of an endless chain passing over a wheel upon the outer end oftheshaft ofthe motor,which revolves around the periphery of a wheel uponthe front axle in line therewith.

The invention further relates to the means employed for equalizing thestrain and friction of the wheels upon therails; and it consists inproviding the inner end of each piece of the axle with a hub having aflange upon its periphery, the two hubs being heldin connection with anannular ange of the rirn by means of a collar upon each, through whichconfiningbolts pass and rigidly confine the collars and rim together insuch a manner that the axles and their connected hubs are permittedindependent rotary motion within the circular orifices of theirconnectingcollars. The inner surfaces of the hubs are coved or recessedto form an oil-reservoir for lubricating purposes, the oil beinginserted through a hole drilled in one of the hubs and closed by meansof a screw-plug.

In the accompanying drawi1igs,which make a part of this speciiication,Figure l is a plan view. Fig. 2is asectional view taken through thebroken line x 'w in the direction of the arrow. Fig. 3 is a sideelevation of the motor. Fig. 4. is a side elevation ofthe hub J, collarK, and rim L. Fig. 5 is a transverse section of the same, taken throughthe broken line y g/ of Fig. 4. Fig. 6 is a face View of a hub.

Like letters of reference in all the figures indicate the same parts.

A is the truck-frame, and A an extension thereof for the reception ofthe operating meehanism. B are the car-wheels, C the rhcostat, and M themotor. L t

Upon the end of the shaft N of the motor is situated the sprocketwheelF,over which the i endless chain I passes and connects the same with thewheel F on the axle H,Whercby propelling motion is imparted to the car.The axles I-I H are each provided with sprocketwheels F2 F3, over andaround which the endless chain I passes, causing a greater amount ofpropelling power to be more equally applied to both axles and with lesstendency for the wheels to slip upon the rails than when motion isimparted to but one axle.

The axles H H are each divided transversely, and are provided .with hubsJ at their inner ends, rigidly secured thercon,which have circulardanges Z, forming their periphery. Collars K, which have centralcircular openings, rest against the outer faces of the ilanges Z, andare secured to the annular tlangem ofthe rim L by means of the bolts n.p of hard metal may be placed between the contiguous surfaces of thetlanges Z ofthe hubs and the collars K, and a like collar, p', betweenthe inner surfaces of the hubs. The inner faces of the hubs are recessedto forni an oil chamber or reservoir, q, for lubricating the parts, theoil being supplied through the hole VVearing-collars.

r in one hub, and a screw-plug, 1", inserted to y prevent the escape ofoil during the revolutions of the axle. Each end of the axle and its hubbeing in a connected piece, the opening in the collar allows of rotarymotion. At the same time all the parts are securel y bound together.

The truck-fran1e A and its extension A are formed together parallellongitudinally with the center of the journal of the axles.

The peculiar construction of rheostat herein shown and referred to ismade the subj eet of an application for Letters Patent filed January 2l,1887, Serial No. 225,049, which is a division of the presentapplication. This rheostat is shown at C in Fig. l. The current is ledfrom the supply-mains by a suitable carrier to the points b b', Fig. l.bis connected with au vIO ance-post.

This bar D has on its under surface and insulated from it two distinctpieces of metal, R R', long enough, respectively, to bridge any of thecontactposts c and semicircular contactbar b, on the one hand, and tobridge one of the undercut pieces E E and another semicircularcontact-bar, bl, ou the other hand. These bars b I)7 are connected withthe motor terminals. Suppose, now, the bar D is shifted so that itsextremity j makes contact with undercut piece Eand its bridge-piece onthe under left-hand side bears on the desired resistllhe current thenproceeds from b to E, through bridge j to bar bl, through the motor tobar b, through bridge-piece R on the under side of E to theresistance-post on which it'rests, through the intermediate resistancesto point b and the source of supply.

I claim as my invention and desire to secure by Letters Patenti 1. In acar for electric railways, the two axles H H', divided transversely andunited by a yielding coupling, as shown, in combination with suitablemechanism for imparting rotary motion to both said divided axles, asdrivers, and their connected wheels, said operating mechanism forimparting rotary motion being connected thereto at but one side of saidaxles, substantially in the manner herein shown and described.

2. In a car for electric railways, the axles H H', divided transverselyand united by a yielding coupling, as shown,and suitable mechanism forimparting rotary motion to said axles and wheels upon one side of thecar, in combination with an electric motor provided with a rheostat forcontrolling speed, substantially in the manner herein shown anddescribed.

JNO. HARTMAN, JR.

